200000001

Appears in sequences

• a(1) = 2, then the smallest squarefree number greater than the previous term that begins with the end of the previous term.at n=22A077209
• a(1) = 1 and a(n+1) is the least number > a(n) that begins with the last digit of a(n) and doesn't end with 0.at n=24A098752
• Lexicographically earliest increasing sequence whose k-th digit is the absolute difference between the two digits touching the k-th comma.at n=26A102663
• Numbers n such that n + phi(n) is a repdigit.at n=28A116018
• a(n) = 2*10^n + 1.at n=8A199682
• Concatenate the positions of digits 0, 1,..., 9 in the decimal representation of n, using 1 for the rightmost digit etc., and 0 when the digit does not occur.at n=19A260519
• Lexicographically earliest sequence of nonnegative terms forming a clockwise square spiral when nothing else is read except the parity of the digits or the parity of the terms (see the Comments section).at n=42A341903
• The lexicographically earliest "Increasing Term Fractal Jump Sequence".at n=15A359611